Machine for making screws, &amp;c.



G. Y. KNIGHT. MACHINE FORYMAKING SCREWS, aw.

APPLICATION FILED JAN. 9, 1904 Patented Mar. 2, 1909.

6 SHEETS-SHEET 1.

2%?? OhaZZZr 94M! G. Y. KNIGHT.

MAGHIF E FOR MAKING SCREWS, @w.

APPLICATION FILED JAN. 9, 1904.

Patented Mar. 2, 1909.

6 SHEETS-SHEET 2.

p 1! 4. W 5 i 5 Q5 a l P wn c G. Y. KNIGHT. MACHINE FOR MAKING SCREWS,6m.

APPLIGATION FILED JAN. 9, 1904.

Patented Mar. 2, 1909.

6 MEETS-SHEET 3.

g es

0. Y. KNIGHT,

MACHINE FOR MAKING SCREWS, 1&0.

APPLICATION FILED JAN. 9, 1904. 914,353, Patented; 2, 909.

6 SHEETS-SEE]ZT 4,

MWQM IQQ A 33 G. Y.,KNIGHT. MACHINE FOR MAKING SCREWS, 6w. APPLICATIONFILED JAN, 9, 1904.

6 SHEETS-SHEET 5.

Patented; Mar. 2, 1909.

G. Y. KNIGHT.

MACHINE FOR MAKING SCREWS, m.

APPLICATION FILED JAN. 9, 1904.

Patented Mar. 2, 1909.

6 SHEBTSSHEBT 6,

...as \j. KNIGHT, OF BOSTON, MASSAOHUSETTS, ASSXGNOR TO POWER & SPEEDGON- ilOLLER COMPANY, OF Qil'Eii'lOYV-N, MASSACHUSETTS, A CORPORATION OFNEW JERSEY.

I'AZACXHLOI'E TEOE SOEFIEWZE, 35o.

Apgallontion file i January 9, 19041.

Specification of Letters Patent.

Patented. March 2, 1909.

awn no. ma n.

lain now and useful lmprovomcnzs in Mnohr for linking Screws. l ke...oil which the win is n :n mciiicution.

This invoniion rr-lnios to automatic llld' rhinos for forming smallarticles. such as rik'i'iWS, bushings. hinclin f pfliiiflfi, sin, bysiiiill;.ll1u( 1i lj.' rotating :1 SLIHH oi rorls or blanks hohl by noi' rotating spindles, :illll sol lho 'l'orwnrrl CHKlH of the rods orhl- .wiilnlvlo orniing tools and to n \"Ellil. iil' iool or lUOlnmlnploil to sever rho nloirrl nrlirlo from aim hlnnir. rho spinrllw.hoing joornnlnll in u lurro'u which is roaural step-by-nlep nnrl lorl olbetween iis poriorlr ol' rotniion. To hold tho blanks in position tocooperate vviih ilio cutters, the said npinillos being roinlml in onedirection :lnring the forming ofwrnlion. and in lheoppoailo diroriiionduring; llw sopurni'ion of the forming iools l'roin no work.

Tho invonl'ion has for iis ohjcor to proriilo various improvements in nmnchine of this (,lilmi lool-zizn; to 'iho Qlfllim ellicienoy mnl ipomiol onvmlion ol lho nnrrhino, and to tho IH'OilllL'liUll oi n w'nlvrrange or ohms l 1... (M- .3 0. non mm min in nnnmnon llP-IUIU ore'nini'lo.

The invoniion also consists in a certain ornmim'lion oi mnrhinolwroinaiiier (lcscrihocl, whorohv iwo hlnnlo; may he ncl'naieclsimulinnoomlv 11ml nri'wl on by forming tools of alw sumo rhnrzirinr tosininli'nneonsiy pro lure n nlnrnlil'y oi similar nrrirlos. the nniilornzmiz-miion hning nlso such thalithe ninrhino may ho znlaprorl io porlorm :1 plurality of Hnvwssivo oporniions on one 21ml thosnmo hlnnli. sothat only one article will he fini ho l at. n time.

The invention illrSO consists in certain oilier improvvmvnln. all ofwhich will he herein after described and claimed.

(in the drawings. the machine is shown organized for turning out twoarticles at one time. although as hereinafter described, itsorgnniza'rion may be readily changed so that it will turn out but onearticle at a time.

l igure 1 is a. sirio elevation of an improved screw-machine constructedin accordance with my invent-ion. 2 is a vertical. cross-soolion on theline 22 of Fig. l. 3 a vertical crosssection on the line 3-3 of Fig. l.4- is a vertical. crossseciion on the line #fr of Fig. l. Fi 5 is avertical. oro-sssection on the line 5-5 of Fig. 1. Fig. 6 is a verticalcrosssection oh the line -i$--G of big. .1. Fig. 7 1s a verticallongitudinal section of the turret shown in Fig. (3. Fig. is a voriicnllongitudinal section of one of the spindles, complete. Fig. 9 is aiiiorsfnoctivo View of the mechanism for nnlocliingflho spimlle-turrot.Fig. 10 is a vertical urns" section on line 1010 of l, showing l'hotool-driving mechanism. Fig. ll is n perspective vinw of one of thelovore; which actuate the cutter-carriages. ldig. I2 is a perspectiveview of the stoparms which determine the length to which tho blankmutorinl is to be fed. Fi 13 represents a section on line 13-13 ofFig. 1. Fig. H is :1 modification ofFig. 13. Fig. reprosenis anothernioclificaiion.

'lhnnrin o reference ol mrnoters indicate the some parts in all thefigures...

In the rlrnwings,10 represents the frame of the n'nichino, and 11 theusual cam-shaft. The. 5 mil 11 may he driven by any suitable morhanisin.which in this embodiment of my invention comprises a worm-gear 12 lioyod"in said shaft, a worm 13 (Fig. the shaft 130 of which is driven by abelt 14 passing over pulleys and 16, and a crossshnfll? (Fig. 1n inrnclriven. by a bevel- ;ronr l8 moshing with n bevel-gear 19 on theprinmrj. (.h'ivingshnfi 20, which receives its power from :1 boltpassing; over the pulley 21.

The npiinlle-mrroli (Figs. 3 and 7) is inolosril in :1 seotionnlcnsingvl'i'l secured to lhn frame 10. The spindles 32, of which four arehere shown, are jonrnnlefl in .the turret 30. nncl. are provided withSpur-pin ionsfill (Figs. (l and 7). which are si- 'lllllliiillGOU-Sl)rotated by internal gear-teeth fornnwl on n ring 3+l- (Fig: 6)surrounding the mirror. 30. The said ring has external gear-teeth .inohing' with n driving-gear, as hereinafter described. One edge of thering 34: boars on a portion of the periphery of no turret 30, and theother edge flange on. n

- worm-gear 66 hereinafter describd. The ring or double gear 34 isalternately driven forwardly and backwardly, to impart like movements tothe spindles, b an intermediate pinion-35 (Fig. 6) whic meshes with theexternal gear-teeth and is aifixed to a shaft 350 which is journaled inbearings outside the casin 31 the inion 35 ro'ectin g p P P J (81through an opening 36 (Fig. 6) in sai to slide thereon while retainingits rot-ati ve engagement therewith, a

ear 42 keyed rlgidly to said shaft and meshing with the gear ,35, ashipping-lever 43 pivoted at 430 to the frame of the machine, and cams440 441 f (Figs. 1 and 4) on a disk 44 affixed-to the shaft 11, saidcams being formed to throw the shipping lever first in one direction andthen in the opposite direction to' cause the cone 41 to alternatelyengage the pulleys 37 and 38 atpredeterminetl periods. Two of thespindles 32 32 are provided with additiona pinions 45 45 (Figs. 6 and7), which constitute parts of tie mechanism for rotatig g the cuttingtools, as hereinafter. described.

Each spindle is provided with mechanism for alternately gripping andreleasing a wire rod or blanlr 100, said mechanism com prising alongitudinally movable sleeve 46 (Fig. 8) within the spindle, coi'nressible chuck-jaws 4-7 atone end of said-s eeve, an internally taperedcollar; 48 affixed to the spindle and surrounding the chuck-jaws, andmeans for impartin a longitudinal thrust to the sleeve 46 in tiledirection required to force the chuck-jaws forwardly and thus causetheir compression by the collar 48 upon the rod or blank 100. Eachspindle is also provided with a device forfeeding I the rod or blanklengthwise through the spindle and chuck-jaws when the latter arereleased and open, said means com rising a longitudinally movable tube49 Fig. 8)

which projects within the spindle and the.

sleeve 46, and which has s ring-jaws- 50 which yieldingly close upon 1:'e rod andare adapted to feed the rod when the tube 49 is thrustforward, andto sli upon the rod when'the tube is moved bac a flangedcol-.

i lar 51. affixed to the outer end of the tube '49,

andan oscillating-lever 52 fulcrumed at 520.

to the frame 10. Said lever has two arms, as shown in Fig. 13, havingstuds 521 which 4 simultaneously-en age grooved collars 5,1 51

on the tubes 49 0 two of the spindles, said .m'ent bcin spindles beingat opposite sides of the axis of the turret. The turret is rotatedstepby-ste as hereinafter described, and each partia rotation brings twoof the collars 51 into engagementwith the arms of thelever 52. The saidlever is oscillated by cams 53 5 ]'-"on a cylinder 50 affixed to theshaft 11, and longitudinally reciprocates the tubes 49 of the twospindles engaged by the lever 52.

Cams 54 54 on a cylinder 540 aifixed to the shaft 11 actuate themechanism which alternately opens and closes the chuck-jaws 47. Saidmechanism comprises a lever 55 (Fig. 4) fulcrumed at 550 to the framelOand having two arms which simultaneously engage two flanged cones 56.Said cones, of which one 1s provided for each spindle, are

fitted to slide on the spindles, each cone co-- operating with levers560 (Fig. 8) pivoted to a support upon the corres ending spindle, theonger arms of said evers bearing on the cone 56 and the shorter arms onthe rear end of the rodor blank-grasping thrust-sleeve 46 in thespindle, the arrangesuch that when the cone is moved forward, t iechuck-jaws are released, so that the rod 100 may be freely fed betweenthem, and when the cone is moved backward, it causes the levers 560 toforce the sleeve 46 forward and rasp the rod or blank.

The means or rotating the turret 30 stepby-step are as follows: Upon theprimary power-shaft 20, which extends along one side of the base of thecasing 31 is loosely mounted a bevel-gear 60, which meshes with abevelgear 61 (Fi 6) affixed to a cross-shaft 62 (Figs. 6 and 7), saidshaft being mounted in bearings in the base of the casing 31. The hub ofthe gear 60 is rovided with an internal tapered friction c utchmember-63 (shown by dotted lines in Fig. 1), which 18 ormed tofrictionally engage the correspondingl tapered periphery of aclutcheollar 64 having a siding and rotative engagement with the shaft20. Afii'xed' to the cross-shaft 62 is a worm 65 (Figs. 6 and 7), whichmeshes with the above mentioned worm-gear 66 afiixed to the turret 30,The turret is alternately locked and released b a latch 67 (Fig. 3),which coacts with note cs 68 68 in a rin 69 secured to one end of theturret. I Theower end ofthe latch 67 is attached to one arm of a lever22' (Figs. 3 and 9) aflixed to a rock-shaft 23 which is mounted in fixedhearings on the frame of the machine. The lever 22 and shaft23 arecaused to rock by the alternate action-of a '5 ring 27 (Fig. 3) and acam 24-- (Fig. 9).

notch 68 which it then oocnpios,

which engages a groove in fi e When the cam act said lever withdrzv-nrsiiielain" some time the rock-shaft 93 causes the lever 26% force theclutclroollar into frictional engagement wiil'i the olni'cli inoinhor ii2i'ffixed to the gear (30. Said goals: flier coy caused to rotate withitlie slm 20', on to no iote tho turret throng-la. air: soriloed Thelatch if? is yeriphery of the ring 59 no rife turret, As soon is snccmill (3 registers with the latch (3T ooicl forced into said notch by thespring which is afiixod at snail to llie ohnfi Q8 and at the other end.the frame of machine. At the some time, 'iho arm 56 withdraws theclutclvcollar 6% from fi'ioiionail. engagement with l ke member 53 onfoo goo 1' 60, so that the operation of the turret-rumiing mechanismcezrsos when i'llfi iiorrot is locked. The path or way formed line ring69 for holding the latch if? against the compression of its spring 27,is our awgiy or depressed at the aris nriiooeot to the notches 01'sockeis 8 on the the notches approached the iotoii as shown. in. Fig. 3at (38. This permits ilio spring pressed latch to be nrgeti inward anotch approaches, so that it musiof a certainty sibut against thefarther Wiiii of the: HOUilL All'possibility of the noiolies beingtin-own past'the latch is thus avoided, and 2o; trance of tho latch intothe noiolxos oo consequent arrest of the iurret is insured,

The mechanism thus for closoribocl provides for the foe rling, the;clutching, n'nfl the rotation of tho rods or biz-inks 1G0, and for therotating and ioclizing of the mil-rot 3i}.

The mechanism for rotating 'illC uniting or forming toois wiil be nextdescribed. A shaft 70, whose outer end is jonrnnled in o. fixed bearing71, amends through o hearing in the center of a sliding ilQflLiYQ, andinto a bearing in the tnrrei'; 30. Said shaft is providd with aspur-pinion 73 (3 and I) which is affixod to the inner and of the shaftand is driven by tho above montionm'i.

inions 45 45 on two of the spindles 32. The head. 7'2 is provided withsockets or bearings 74 (15%. 5 for the reception of tool-chncks 75 holing and operating; tho forming or cutting tools, there being manyboarings 74 as there are spindles. In the embodiment of my inventionhere shown, only iwo chucks; are employed, each chuck holding a tool in,which is or may be a drill. It will be understood, however, that eachsocket may be .pro- "ided with a working tooLund that no tools may bemembers of :1 series, each performing its allotted Work on the blanksarbor of each chuck passes through its socket Ti,

- wow .0 sewer i con.- ilio a i-. z feather-2d on the short F9 andadopted lo slidothereon. it will be soon, lliot'efol'c, that formingtools 7%? receive iron: the soim llos o. rotary op um to tisoiliae-qpindles. r between fii zooi to our?! wiiini carries with it thesliilolilo gonr hoing gzroovo 8 inio which in" oremiret 8% iii) soul torho mo 42.

Two woo .iols 8:"; 8o 5 i are inisi ilio rods on. wi 'ch or no wool;

in; to irool ouch .lovor ii. and on :o wi;

4. +-Irnne, an its lower 880., 2: slot iooiznial, of tho miroiog; 2.;HT.

' i or and of ii 8*.) may be. K'Ri'lO-ii lfig. ii, so ll oi, ilioshifting of tho 9O wiii not dial-ovate ii wiilo and ocom'zilo range of:uijnolmonl is thus provided for the; oni f ilw two (coffers 2% are omdto o prooofi and froooiie from the work simullonooosly.

it "will be soon from the foregoing (lo/scrip ijion that the nian on:Foo; fOl'WiUll stop-by-step. and locked 163i am-l1 mlmnvomom: and ilwill also ho so n doll i lio blanks 111 Two (llznnoirniolly opposi'lospin dim; (u-o 'ffili forwarai wlion said spindles, are in o horizontalplane relatively to ouch olilmr;

or in other W0l(iS, are 111 position to on enwood :1 the two arms of thelover 52 as n u 9 shown 1: 1 1g. 13.

longih. of fOI'WZilii food of too blanks. as

Provision is made; dotomnining om follows: Two bell-crank levers 94(Figs. 1, 5, and 12) having in their upper ends ad justable stop-bolts95, are provided, one for each of the two simultaneously-fed blanks;Said levers are fulcrumed to the frame 10 -at 96 9(3. The lower ends ofsaid levers exwhile the head 72 is at the backward exv the ordinary typeof machine of this class,

tremc of its movement, as shown in Fig. 1, The blanks 100 therefore abutagainst the stopdrolts 95 when they are advanced, and the length of thefeed movement of said blanks 1S determined by the adjustment of saidbolts. When the blankshave been fed forward to the stop-bolts 95, thelevers 9-1 are swung outwardly to allow the head 72 to advance betweenthem.

The machine organized as above described is adapted to turn out aproduct of a relatively simple nature, requiring but one operation, suchas the formation of a longitudinal orifice by a drill 76, to prepare thearticle before it is severed from the blank on which it is formed. It isevident, then, that as two blanks are fed at one time, two blanks actedon'at one time, and two formed articles severed at one time, thecapacity of this machine, in which one complete article is produced fromeach blank for every one hundred and eighty degrees of rotation of theturret 30, is twi e as great as that of in which one complete article isproduced from each blank for each complete revolu: tion of the turret.

The machine may be ada ted to produce work of a more complicatec nature,requiring two or more successive operations on each blank, by providingeach socket T4. in thehcad 72 with a cutting tool, each tool beinggeared to the central gear 79, and each being formed to perform itsallotted part of the forming operation. \Vhcn the article'is to beformed by successive operations, as last indicated, the levcrsfll andshould be formed to engage but one of the collars 51 and 56, as shown inFigs. 14 and 13, so that only one blank or rod will be fed forward at atime, the result being the formation of but. one article during eachcomplete rotation of the turret, instead of two articles. \Vhen themachine is operated as last described, but one severing tool will berequired, and the place of the other severing tool may be m ses occupiedby another forming tool, which. maybe located in the adjacent socket/Z4.Each blank may therefore be subjected to as many asthree operationsfrom'as many iZOOlS in the head 72, before the severing operation."

Another operation may be performed by substituting for one of thesevering cutters 85, a tool adapted to form a peripheral groove in theotherwise formed article.

In addition to the operations above described, provision is made forsubjecting the article to an additional tool, such as a nurl,

adapted to roll or rotate in contact with'the said article. To this end,I prov de a rock;

shaft 102, journaled in hearings on the up per' portion of theturret-casing 31. To the a rear end of saidrock-shaft is affixed an arm103 (Figs. 2 and 3). Said rock-shaft is 035" cillated by a earn 104 onthe shaft 11 and a spring 107 (Figs. 1 and 3) hereinafter de scribed.The min 104 acts directly upon a;

dfsa

bears at its lower end on a fixed support and I exerts an upwardpressnreon a collar afiixed to the rod 106. To the forward end of therock-shaft 102 is attached an arm 108, shown in dotted lines in Figs. 2and 7. A rotary nur'ling tool 109 is mounted on the end of? said arm,and is swung by the rockingof the,

shaft. 102 againstone of the blanksQl-(ltlin.

close proximity to the chuck 48 holding said, blank. x

The rota'r-y tools or drills carried by 190 the head 72 may be lockedagainst rotation by loosening the collars 77 on'the shaft 70,

and slidiugsaid shaft toward the turretgiit) uutil the pinion 73 (Fig.7)is thrown?out of engagement with the pinio ns 45, as shown, i

by dotted lines in Fig. 7, and then screwing no the set-bolts 750against the arbors of the,

tool-chucks 75 in the sockets 74. I claim:

1. Amachine of the character stated, coizia I prising a turret rotatedstep-by-step, rota spindles journaled therein, means for simu' taneouslyfeeding blanks in two of said spindles at opposite sides of the axis ofthe turret, a pair of bell-crank levers connected togcther sothatmovement of one operates the other pivoted to the frame of the machineand adapted to oscillate in a plane at right angles to the feedmovement, said levers having' adjustable stop-screws, and means foroscillating said levers simultaneously in opposite directions to movethe stop-screws alternately into and out of the paths of saidsimultaneously fed blanks.

2. A machine of the character stated,co1nprising a rotary turret havingseries of work-holdingspindles,a worm gear affixed to the turret, aworm-shaft, the worm of for rocking said shaft simultaneously to acwhichis engaged by said worm-gear, a drivtuate the locking device and themovable ing shaft having a loose gear meshing with a clutch memberalternately to rotate and argear afiixecl to the worm shaft, said looserest the turret. 4

5 gear havin a clutch member, a movable In testimony whereof I havealfixed my 15 clutch mem er having a sliding and rotasignature, inP16861100 of two Witnesses.

tive engagement with the drivmg-shaft, a HARLES Y. KNIGHT.

turret locking device, a rock-shaft connected Witnesses: with thelocking device and with the mov- C. F. BROWN,

19 able clutch member, and automatic means E. BATCHELDER.

